Sequential order when downloading a playlist

I'm downloading a playlist. All videos are added to 4K Video Downloader, but the order of downloading is random. Moreover it seems like some videos froze with downloading indicator. It is confusing. I want to be able to download sequentially and without freezing. Now I have downloaded part 8 - part 12 and I don't have part 1 to start watching.

4K Video Downloader version 4.4.11.2412